---
title: "1 plus 1 design — Architects & Building Designers | Houzz"
canonical_html_url: https://www.houzz.com/professionals/architects-and-building-designers/1-plus-1-design-pfvwus-pf~1862275068
markdown_url: https://www.houzz.com/md/professionals/pf~1862275068.md
entity_type: LocalBusiness
business_name: "1 plus 1 design"
category: ["Architects"]
image: https://st.hzcdn.com/fimgs/e973f84c0f8d7af8_2860-w400-h400-b0-p0--.jpg
address: "30 North St, Hingham 02043, United States"
latitude: 42.2245
longitude: -70.8911
phone: "(617) 807-0121"
website: http://1plus1-design.com
rating: 5
review_count: 7
best_of_houzz_awards: 7
followers: 323
last_updated: 2026-08-26
---

# 1 plus 1 design

Original Houzz profile: [1 plus 1 design](https://www.houzz.com/professionals/architects-and-building-designers/1-plus-1-design-pfvwus-pf~1862275068)

## Professional summary

- **Primary category:** Architects
- **Location:** Hingham
- **Serves:** Boston, Milton, Marshfield, Hingham, Scituate, Norwell, Cohasset, Marshfield Hills
- **Houzz rating:** 5.0 out of 5 (7 reviews)
- **Best of Houzz:** 7 awards (2013–2020), for Design, Service.

## About

### Houzz Badges

- Houzz Influencer
- Recommended on Houzz
- 100,000 Ideabook Saves

A full service residential design studio that strives to produce thoughtful and creative solutions that respond to the diverse needs of our clients.

### Services Provided

- Architectural Design
- Building Design
- Home Remodeling
- Architectural Drawings
- Custom Homes
- House Plans
- New Home Construction
- Home Additions
- Home Extensions
- Kitchen Design
- Kitchen Remodeling
- Energy-Efficient Homes
- Green Building
- Bathroom Design
- Space Planning
- Pool House Design & Construction
- Drafting
- Home Restoration
- Historic Building Conservation
- Project Management
- Handicap-Accessible Design
- Mudroom Design
- Basement Design
- Staircase Design
- Deck Design
- Landscape Plans
- Laundry Room Design
- Home Gym Design & Construction
- Rooftop Deck Installation

### Areas Served

- Boston
- Milton
- Marshfield
- Hingham
- Scituate
- Norwell
- Cohasset
- Marshfield Hills

## Business Details

| Field | Value |
| --- | --- |
| Business Name | 1 plus 1 design |
| Address | 30 North St, Hingham 02043, United States |
| Phone | (617) 807-0121 |
| Website | http://1plus1-design.com |
| License Number | 018710 |
| Followers on Houzz | 323 |

**Social profiles:**
- Facebook — https://www.facebook.com/1plus1Design
- Blog — 1plus1-design.com

## Contact

- **Houzz profile:** [1 plus 1 design](https://www.houzz.com/professionals/architects-and-building-designers/1-plus-1-design-pfvwus-pf~1862275068)
- **Website:** http://1plus1-design.com
- **Phone:** (617) 807-0121

## Credentials

**Certifications & Awards**
- LEED AP, NCDIQ

- **Best of Houzz:** 7 awards (2013–2020), for Design, Service.

## Reviews

**Overall rating: 5.0 out of 5 — 7 reviews**

### All 7 reviews

**★★★★★ — lehighrobinson, Dec. 2015**

> Brandon was very professional and easy to work with. Brandon successfully maintained the integrity of our 1917 home while adding modern appliances and spaces.  Brandon had creative ideas and was able to come up with a plan that we liked in a very short amount of time.  Many thanks!

**★★★★★ — Barb Cu, Jan. 2015**

> "Silk purse out of a sows ear".  This house was a small beach house that had not been worked on since the eighties.  The first floor renovation that Brandon Diem designed was so beautiful and efficient.
>
> Detail seems to be one of his high priorities, and it shows in the rave reviews received by our neighbors.
>
> The referrals 1+1 Design gave us were terrific. Contractor, counter tops,and cabinets were extremely easy to work with

**★★★★★ — markandsharon, Dec. 2013**

> Brandon assisted us with the design of our kitchen in our new home. His design sense and expertise were such a asset in helping us realize the kitchen of our dreams. Brandon not only helped us create a beautiful space, but made sure we stayed within our budget. We would highly recommend Brandon for anyone that is building new or remodeling.
>
> Mark Stafford
> Sharon Thibeault
> Marshfield Hills, MA

**★★★★★ — Dishington Construction - Jensen Hus, Dec. 2013**

> I worked with Brandon on a Hingham addition/remodel that he designed. I was sub contracted by EKC Construction Management to build several custom built-in cabinetry projects. A mudroom bench with cubbies, large home office, creative master bedroom built-ins and an extremely challenging curved kitchen banquette. I was grateful for the opportunity to bring Brandon's designs to life. He was extremely detailed and was responsive when I had questions about the designs. I look forward to working with him again in the future.

**★★★★★ — tobrs, Nov. 2013**

> We were very happy with 1 plus 1. We renovated a South End loft and they designed a completely new layout for a 2,700 sqft space, and did the bathrooms and the kitchen. Brandon clearly understood what we wanted to achieve and had great innovative ideas of how to make it the ideal space for our needs. The kitchen cabinets are fantastic. All custom, high end quality and a very good price. We shopped with others but nobody else could deliver the same value.

**★★★★★ — stewmartz, Sept. 2013**

> 1 plus 1 did a great job with updating our kitchen.  Brandon and Sara were extremely professional and were real pros at guiding us through the process.  We are extremely happy with the updates and feel we have added tremendous value to our home.

**★★★★★ — lormah, Aug. 2013**

> We were very pleased with 1 Plus 1 Design and the final outcome of our new kitchen. Brandon did an amazing job of listening to what we wanted and fulfilling our needs in the design. We LOVE our new kitchen and how functional it is - it actually makes home cooking a joy!
>
> I'd highly recommend Brandon for any architectural job. His vision is well suited for traditional to contemporary, and, remodels to new homes. He is easy to work with and understands what it takes to create a beautiful, functional living space. He was also very skilled at coordinating with the GC and trades, getting the project done on time and on budget.
>
> We would definitely hire 1 Plus 1 Design for any future projects.

## Selected projects

- [Transitional New Build](https://www.houzz.com/hznb/projects/transitional-new-build-pj-vj~6097822)
  - Location: Not specified
  - Photos: 12
  - Description: A new build with a transitional inspired open interior.
- [Love it or List it](https://www.houzz.com/hznb/projects/love-it-or-list-it-pj-vj~5953297)
  - Location: Hingham, MA
  - Photos: 12
  - Description: A small kitchen and 2nd-floor bedroom addition open up the opportunity to create the family's dream home.
- [Hingham Kitchen + Mudroom](https://www.houzz.com/hznb/projects/hingham-kitchen-mudroom-pj-vj~2648801)
  - Location: Hingham, MA
  - Photos: 13
  - Description: Steps away from Hingham Center, this historic home was renovated to support the lives of a busy young family. A new mudroom addition with plenty of storage connects to a new, relocated kitchen. This places the kitchen in a more central location with easy access to the open back yard and family room. A new large breakfast area and butler's pantry/ bar connects to the formal dining room.
- [Hingham Renovation & Addition](https://www.houzz.com/hznb/projects/hingham-renovation-and-addition-pj-vj~1378646)
  - Location: Hingham, MA
  - Photos: 9
  - Description: A suburban colonial gets a major update that includes a 2 car addition with master suite above. The existing floor plan is reorganized and updated for a young family.
- [Elegantly SimpleTraditional Empty Nester](https://www.houzz.com/hznb/projects/elegantly-simpletraditional-empty-nester-pj-vj~91302)
  - Location: Wellesley, MA
  - Photos: 9
  - Description: An existing modest Dutch colonial was completely renovated for a new owner. Main bearing walls were reconfigured to allow for a more open floor plan and more efficient use of space. Warm materials and finishes were used to highlight the white mill work and stone.
- [Waterfront Shingle Style](https://www.houzz.com/hznb/projects/waterfront-shingle-style-pj-vj~49870)
  - Location: Groton Long Point, RI
  - Photos: 10
  - Description: An aging cottage is razed to make way for this weekend family waterfront retreat.
- [Hingham rehab](https://www.houzz.com/hznb/projects/hingham-rehab-pj-vj~1334096)
  - Location: Hingham, MA
  - Photos: 6
  - Description: A 20th century old home is renovated to accommodate a 21st century family.
- [Historic Hingham Addition](https://www.houzz.com/hznb/projects/historic-hingham-addition-pj-vj~1248222)
  - Location: Hingham, MA
  - Photos: 5
- [Tudor Renovation](https://www.houzz.com/hznb/projects/tudor-renovation-pj-vj~127125)
  - Location: Needham, MA
  - Photos: 13
- [Misc Projects](https://www.houzz.com/hznb/projects/misc-projects-pj-vj~128078)
  - Location: Not specified
  - Photos: 13
- [Man Cave](https://www.houzz.com/hznb/projects/man-cave-pj-vj~45595)
  - Location: Needham, MA
  - Photos: 5
  - Description: A basement renovation for the man of the house. A wine cellar, bar, lounge, billiards rm and theater create the ultimate man cave.
- [Wellesley Basement Transformation 2016](https://www.houzz.com/hznb/projects/wellesley-basement-transformation-2016-pj-vj~2311035)
  - Location: Wellesley, MA
  - Photos: 18
  - Description: I was reffered to a wonderful new client in Wellesley by Sara and Brandon Diem of One Plus One Design. We had previously worked on anther project and they knew this highly detailed project would be in our wheel house. The client had a beautiful home right off downtown that needed one final update. The basement was unfinished and small but we needed a laundry area, TV space as well as storage, a mudroom and dry bar. Tight quarters for all those elements but we pulled it off.

[See all 12 projects](https://www.houzz.com/professionals/architects-and-building-designers/1-plus-1-design-pfvwus-pf~1862275068)

## Ideabooks

- [outdoor](https://www.houzz.com/ideabooks/7795996/list/outdoor) — 4 ideas

[See all 1 ideabook](https://www.houzz.com/ideabooks/users/bdiem)

## Community Q&A

**Q: beautiful kitchen** *(in Photo Questions)*

Could you please share what material you used for your island top?

A: That countertop is White Rhino

**Q: Pendants** *(in Photo Questions)*

Where are the pendants over island/sink from

A: Rejuvenation lighting

**Q: Was the vanity custom made?  Looking for something like this for our b** *(in Photo Questions)*

A: It was a custom made. We could have one made for you as well! Feel free to contact us for more information.

**Q: Lovely bath!** *(in Photo Questions)*

Would you say that the whitw cloud used on the cabinets is a warmer or cooler white? I want to use white but like warm paint colors on the wall. Thank you!

A: It is a white white. If you are looking for a warmer white -925 Ivory White is a good option.

**Q: Love the design of the bottom of your toilet.** *(in Photo Questions)*

Can you tell me the brand of your toilet?

A: It is a Kohler Memoirs

**Q: Love the print above the fireplace.  Who is the artist?** *(in Photo Questions)*

A: This piece is by American Pop artist Roy Lichtenstein

---

*Source: Houzz professional profile. Reflects the profile as of 2026-08-26.*